Understanding OQAS

Objective measurement of true vision quality has become an urgent need for all the professionals in the optical field in general and for the ophthalmic surgeons in particular.

OQAS™ (Optical Quality Analysis System) is based on the double-pass technique and provides an objective measurement of the optical quality of the eye.

A punctual light source is imaged on the retina. The size and the shape of the light spot (light passes twice through ocular media) is analysed by OQAS™.

OQAS™ allows to perform measurements in a wide range of clinical situations. Obviously, one of the most promising applications area for OQAS™ is refractive and cataract surgery.

OQAS™ images contain all the information about the optical quality of the eye including all the higher order aberrations and scattered light, being both generally missed by most aberrometric techniques. These higher order aberrations may have an important impact on refractive surgery, as scattered light on the aging eye.

OQAS is specially designed for:

• Comparing pre and post cataract and refractive surgery measurements.
• Diagnosis of pathologies.
• Right measurements of the ocular MTF (Modulation Transfer Function) in all situations (overestimated by aberrometers when scattering exists).
• Showing the effect of ocular aberrations in visual acuity (including the higher order ones, not usually measured by standard aberrometers).
• Objective measurement of the amplitude of accommodation.
• Showing the effect of accommodation in the quality of the retinal image.
• Objective measurement of halos and glare.
  

OQAS provides

• Two and three dimensional maps of the retinal image, a qualitative way to evaluate the quality of the eye.
• The ocular MTF and other quantitative parameters useful for evaluating the performance of the eye.
• A dynamic register (video) of the retinal image.
• A useful and user-friendly patient database.
• Tools for optimum visualization and quantification of the images, such as zoom, rotation, profiles and measurements.
• Easy acquisition and manipulation of the images.

(Top)

© 2010, Visiometrics - All rights reserved - OQAS™